Measure
Complete normal typing tests so the profile has real attempts and errors to compare.
Your recent tests identify the keys that need attention. The drill automatically concentrates on those keys and changes as your accuracy improves.
General typing tests tell you your overall speed and accuracy. This drill looks one level deeper: it identifies the characters that account for a disproportionate share of your errors and builds practice text around them. As those keys become more reliable, their priority falls and the drill shifts toward the next useful group.
Complete normal typing tests so the profile has real attempts and errors to compare.
Type short drills that repeat difficult letters inside varied, pronounceable patterns and common transitions.
Return to full sentences and confirm that the improved key control holds during natural typing.
Slow down enough to press each target key with the intended finger. Keep your wrists neutral, release unnecessary tension, and look at the screen instead of the keyboard whenever possible. If one sequence breaks your rhythm, repeat it cleanly rather than rushing through another error.
WPM may dip during focused practice. That is expected: the goal is to replace hesitation and incorrect movements with a repeatable motion. Speed usually follows when the motion becomes automatic.
Several short sessions across a week give the profile more useful evidence than repeatedly forcing tired hands through one long workout.
The feature records aggregate attempts and errors for the character you were expected to type. It does not need to store the passage you entered. Anonymous profiles stay in the current browser; clearing its site data can remove them. A free account lets supported practice data follow you between devices and makes longer-term progress easier to review.
It compares attempts and errors for each expected character in your recent typing tests, then gives more practice to the keys with the highest error rates.
Anonymous visitors keep their practice profile in this browser. Signed-in members can use their account-based profile between supported devices. The feature records aggregate key attempts and errors, not the passage you typed.
The drill starts with a balanced set of common letter patterns. Complete a few standard tests and it will become more specific to your own mistakes.
Short, accurate sessions of five to ten minutes are usually more useful than one long session. Stop if your hands become tense, and retest with normal prose after several drills.